Y/n: the mechanical brawler of Darkus and Pyrus

chapter 4 Dagon vs issei finally, freedom of rias and ddraig, shadow figure.

As Dagon transform and ready for battle. Iseei juggnut drive went for attack, Dagon jump on air.
Y/n: ability activate triple flame fist.

As a large fury like flame hit issei, he scream and roar like dragon. Then issei look at audience and ready to fire.
Sirzechs: prepare you self!
Issei charge up his chest to audience, everyone was afraid to die.

But Y/n jump 8n and activate his ability card.
Y/n: ability activate barrier of light!

As beam hit. It protect audience, Y/n look at issei, he is very mad right now.
Y/n: double ability activate dragon burst times two.

Y/n look at iseei, he is very disappointed what have he become.
Y/n: issei, I don't why you do this, but you given too chance redeem himself. So I have no choice but to put you down.
He look at headmaster and sirzechs at moment. Sirzechs knows what need to do, and give his words.
Sirzechs: Y/n you given permission to put issei down for good.
Everyone surprise, hear given to kill issei for his rampage in that arena.
Y/n look at issei for moment and said his ultimate ability card.
Y/n: fusion ability delta dragon fist!

As large dragon went throw issei, he roar unpainted before fell down and turn back.
Then Dagon body begin to fell down, and Y/n knows is too much for Dagon to be in balance breaker.
Y/n: shut down now!
As red light flashing, Dagon return to his original form. Before turn back to ball form and went back to Y/n. Issei look at Y/n before ddraig came out.
Ddraig: issei, your disappoint to be my partner, you never train and your pervert as well. Now I need to find a worthy a partner.
Y/n thinking and ask Ddraig a question about one of his friend.
Y/n: hey ddraig, what about my friend izuku midorya.
Izuku surprise hear his friend tells him about him.
Ddraig listen to Y/n, he like how izuku train hard to be a hero, and he get stronger.
Ddraig: very well, I will transfer to young izuku.
Izuku left arm glow, and reveled drraig appeared.
Ddraig: greeting young izuku.
Izuku: hi draig.
As both talk each other, Y/n smile for ddraig new partner and izuku as well.
Sirzechs: now since issei die, rias will given hand of marriage to Y/n.
Y/n blush, as well for rias, but ruby, momo, and velvet. Bullies is mad, bakugo is made that izuku got power.
Y/n: ok now I am going back to lab.
As he and his team left, nezu, ozpin, and glynda want Y/n back to union, and sirzechs is happy to see him.

In a dark room, a young man had a guthlet, and has his own lab. With simple of boost gear shards. He look at screen were issei is gone, and Y/n is there.
???: now that worthy enemy to fight him.
Then a blue eyes in chamber begin glow at Dagon for battle one day.